summaryrefslogtreecommitdiffstats
path: root/keystore/java/android/security/keystore/KeyProtection.java
diff options
context:
space:
mode:
Diffstat (limited to 'keystore/java/android/security/keystore/KeyProtection.java')
-rw-r--r--keystore/java/android/security/keystore/KeyProtection.java3
1 files changed, 2 insertions, 1 deletions
diff --git a/keystore/java/android/security/keystore/KeyProtection.java b/keystore/java/android/security/keystore/KeyProtection.java
index 5b4b3e7..ec0ef24 100644
--- a/keystore/java/android/security/keystore/KeyProtection.java
+++ b/keystore/java/android/security/keystore/KeyProtection.java
@@ -423,7 +423,8 @@ public final class KeyProtection implements ProtectionParameter {
* <p>This must be specified for signing/verification keys and RSA encryption/decryption
* keys used with RSA OAEP padding scheme because these operations involve a digest. For
* HMAC keys, the default is the digest specified in {@link Key#getAlgorithm()} (e.g.,
- * {@code SHA-256} for key algorithm {@code HmacSHA256}).
+ * {@code SHA-256} for key algorithm {@code HmacSHA256}). HMAC keys cannot be authorized
+ * for more than one digest.
*
* <p>For private keys used for TLS/SSL client or server authentication it is usually
* necessary to authorize the use of no digest ({@link KeyProperties#DIGEST_NONE}). This is